GMC Yukon XL Denali Head Gasket Replacement Cost.

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The average cost for a Head Gasket Replacement is between $1146 and $1604. Labor costs are estimated between $765 and $966 while parts are priced between $381 and $638. Estimate does not include taxes and fees.

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Best Practices

To prevent an expensive, recurring problem, the integrity of the entire GMC Yukon XL Denali's cooling system should be inspected and tested when a head gasket is replaced.

During this repair, the cylinder head(s) may need to be inspected and machined. Additional repairs may be needed after the inspection. This can add several hundred dollars to the repair and are not included in the RepairPal estimate.

Cylinder head or head gasket replacement is a large, time-consuming repair that often occurs when the engine has high mileage and/or the engine has been overheated. Due to these conditions several additional parts will be needed during the repair. These may include cooling system components (hoses, water pump, radiator, thermostat, etc.) vacuum lines, timing belt, ignition wires, and more. These will be in addition to the RepairPal estimate above.

Common Symptoms

GMC Yukon XL Denali head gasket failures are often due to an overheated engine, but can also be caused by high mileage and/or age.

An early sign of a failing head gasket will be a rough running engine when you first start the vehicle, especially if it's been sitting overnight. The rough running will generally last for only a few seconds.

A leaking head gasket or cracked cylinder head will often leak engine coolant into the oil, causing a "chocolate milk" like appearance and the oil level my be higher than normal.

Failed head gaskets or damaged cylinder heads can cause engine coolant to leak into the combustion chamber, producing a white, sweet-smelling smoke from the tail pipe.